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188 SAFETY CATALOG 2004
Safety class
Class 4
Supply voltage
24 V DC/AC
Output contacts
Safety
2
Dimensions
87 x 22.5 x 122 mm
Auxiliary
1
Function
Dual-channel wiring with short circuit detection
Supply voltage 24 V AC/DC
Automatic/manual start
External device monitoring (EDM)
Version with connection clamps available
Safety Category 4 approved to
EN 954-1
Stop Category 0 approved to
EN 60 204-1
2 normally open (NO) contacts,
1 normally closed (NC) contact
Automatic/manual reset
External device monitoring (EDM)
3 LED signals
Monitors the integrity of connection of safety circuit and control (ts = 0.5 s)
Suitable for applications with safety optoelectronic barriers with tested static outputs
Safety optoelectronic barriers (ESPE) with monitored static outputs (OSSD), like FGS, C 4000, MSL, PLS, LSI,
S 3000, C/M 2000, C 4000
Emergency stops according to EN 418
(single and dual channel)
Safety switches for movable guard control (single and dual channel)
Safety mats in compliance with DIN
EN 1760, with 4 wire technology

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After applying the supply voltage (LED SUPPLY illuminates), the normally open contacts remain open. If the connected sensor is not activated or the protective field of the connected electrosensitive protective equipment (ESPE) is not broken (i.e. the input circuits are closed), then the normally open contacts close immediately in Automatic
Reset, LED K1 and K2 illuminate. In the case of Manual resetting, this only occurs after pressing and releasing the Reset button.
The activation of the sensor or infringement into the protective field of the non-contact safety device (open state of one of the two input circuits) effects the opening of the normally open contacts (LED K1 and K2 off).
Example of connection of emergency stop button to single channel with manual reset
External device monitoring (EDM)
The unit can take over external device monitoring. The contactor monitoring system monitors the external relays by way of their normally closed contacts.
Manual reset
For manual resetting, a pushbutton must be connected to terminals S33 - S34. This
Reset is monitored.
Automatic reset
For ESPE’s: S33 - S35 must be linked for applications with potential free contacts on the input circuit S12 - S35 must be linked.
Cross circuit detection
Cross circuit is detected on dual-channel wired systems, if these are wired with opposing polarity.
Example of connection between a safety curtain with manual reset and EDM
The UE 48-2 OS 2 unit has screw type terminals.
The UE 48-2 OS 3 unit has removable terminals.
SAFETY CATALOG 2004 189

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190 SAFETY CATALOG 2004
General data description
Supply voltage to A1/A2
Electrical output circuit > 25 V AC/60 V DC
Electrical output circuit < 25 V AC/60 V DC
Safety category: EN 954-1
Stop category: EN 60 204
Supply voltage V
S
(A1/A2)
Power consumption
AC mode
DC mode
Residual ripple in DC mode (within the limits of V
S
)
Nominal frequency in AC mode
Control voltage S33/S11 and S21
Control voltage
Control current
Electrical short circuit between S33/S11 and S21 min.
typ.
PELV
PELV or SELV
0
20.4 V AC/DC
50 Hz
17.4 V DC
40 mA
4
24 V AC/DC 26.4 V AC/DC
22 V DC max.
4.6 V A
2.1 W
2.4 V
PP
60 Hz
100 mA
300 mA
Reaction time by cross connection
Switch-on time after cross connection detection
Galvanic separation between A1/A2 and S21, S11, S33
Input circuits (S12, S31, S22, S34, S35)
Input voltage (S12 and S31)
HIGH
LOW
Input current at S12 and S31/S22
Input current at S34/S35
Reset time
Manual (S22/S34)
Automatic (ESPE: S33/S35; potential free: S12/S35)
Activation time for Reset button
Minimum switch-off time/Minimum switch-on time
Permitted test pulse time/Test frequency
Line resistance at the input circuit no
17.4 V DC
-3 V DC
50 ms
7 ms
40 mA
5 mA
50 ms
50 ms
26.4 V DC
+5 V DC
100 mA
50 mA
40 ms
80 ms
1000 µs/10 s
-1
35 Ohm
Synchronization time70 ms
Output circuits (13 - 14, 23 - 24, 31 - 32/33 - 34)
Response time (K1/K2)
Minimum switch-off time70 ms
Relay contacts
Contact type
Contact material
Load capacity of contacts
Switching voltage
Switching current
Total current across all contacts
Application category to EN 60 947-5-1
2 normally open contacts (NO), safety relevant
1 normally open contact (NO), not safety relevant positively guided
Silver alloy; gold-plated
10 V AC/DC
10mA
25 ms
130 ms
230 V AC/30 V DC
6 A
12A
AC-15 Ue 230 V AC, I e
4 A (360 c/h)
AC-15 Ue 230 V AC, I e
3 A (3600 c/h)
DC-13 Ue 24 V DC, I e
4 A (360 c/h)
DC-13 Ue 24 V DC, I e
2.5 A (3600c/h)
Permitted switching frequency
Mechanical service life (switching cycles)
Electrical service life (dependent upon loading)
Operating data
Surge voltage rating (V imp
)
Excess voltage category
1 x 10
2 x 10
7
6
3600 c/h
4 kV
III
Contamination rating of the unit (EN 50 178)
External
Internal
Voltage rating
Test voltage V eff (
50 Hz) EN 60 439-1
Protection type
Housing
Terminals
Radio interference
Screening against interference
Ambient operating temperature
Storage temperature
Cross sections of electrical conductors single strand wire (2x, identical cross section) single strand wire (1x) fine stranded wire with terminal crimps
(2x, identical cross section fine stranded wire with terminal crimps (1x)
Weight
IP 40
IP 20
DIN EN 61 000-6-4
DIN EN 61 000-6-2
-25°C
-25°C
0.14 mm
0.14 mm
0.25 mm
0.25 mm
0.2 Kg
2
2
2
2
3
2
300 V AC
2 kV
+55°C
+75°C
0.75 mm
2.5 mm
0.5 mm
2.5 mm
2
2
2
2

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A1 A2 S34 S35 13 23 31
RESET
SUPPLY
CONTROL-LOGIC
Channel 1 Channel 2
(+) (+) (-)
-
S21
+ +
S11 S33 S12 S31 S22
K1
K2
14 24 32
Model
UE 48-
UE 48-
2
2
Output
OS
OS
Connection (terminal type)
Screw Removable
2
3
Supply voltage
24 V DC
D2
D2
We recommend contacting Customer Service for product selection
Part number
6 024 915
6 024 916
SAFETY CATALOG 2004 191